Cannot setup userlogs in Snabox cluster

Please help me to solve a simple problem. I have two setups of Hadoop : Sandbox from Cloudera and my own installation of 3-node cluster. In both cases I run the same mapreduce and in both cases I face two issues:

1) I cannot see userlogs that my mapper prints.

2) for some reasons hadoop runs reducer in the scope of my job, while in fact I dont have a reducer in my code!

Could you please help me with this?

I have noticed that the default log4j.properties file do not has some appender added to root logger, except for console appender. OK, I have added RFA appender to root logger. But this helped me not.